28073533 has 2 divisors, whose sum is σ = 28073534. Its totient is φ = 28073532.

The previous prime is 28073509. The next prime is 28073567. The reversal of 28073533 is 33537082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15984004 + 12089529 = 3998^2 + 3477^2 .

It is a cyclic number.

It is not a de Polignac number, because 28073533 - 2⁹ = 28073021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28073495 and 28073504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28073503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036766 + 14036767.

It is an arithmetic number, because the mean of its divisors is an integer number (14036767).

Almost surely, 2^28073533 is an apocalyptic number.

It is an amenable number.

28073533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28073533 is an equidigital number, since it uses as much as digits as its factorization.

28073533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 28073533 is about 5298.4462816943. The cubic root of 28073533 is about 303.9244856584.

The spelling of 28073533 in words is "twenty-eight million, seventy-three thousand, five hundred thirty-three".